Update git submodules

* Update docs/submodules/parser from branch 'master'
  - Fix integration error when no role of heat_stack_owner

    If there is no role of heat_stack_owner in openstack, integration
    will be error, the patch will fix it.

    JIRA: PARSER-162

    Change-Id: I74d4e70153a312c1a64c75e0ff956b7ab2219adf
    Signed-off-by: shangxdy <shang.xiaodong@zte.com.cn>

diff --git a/docs/submodules/parser b/docs/submodules/parser
index 7992323..e0ff4c6 160000 (submodule)
--- a/docs/submodules/parser
+++ b/docs/submodules/parser
@@ -1 +1 @@
-Subproject commit 79923230d9636c426493505868ba228ba5931896
+Subproject commit e0ff4c6768fdae895d529cd7975fe90c913169c5